# Sachin is younger than Rahul by 4 years. If their ages are in the respective ratio of 7 : 9, how old is Sachin ?

$\par&space;Let&space;Rahul's&space;age&space;be&space;x&space;years.&space;Then,&space;Sachin's&space;age&space;=&space;(x&space;-7)&space;years$

$\frac{x-7}{x}&space;=&space;\frac{7}{9}$

$9x&space;-&space;63&space;=&space;7x$

$2x&space;=&space;63$

$x&space;=&space;31.5$

$\par&space;Hence,&space;Sachin's&space;age&space;=&space;(x&space;-&space;7)&space;=&space;24.5&space;years$